package com.hmdp.interceptor;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.LOGIN_USER_TTL;


@Slf4j
public class RefreshTokenInterceptor implements HandlerInterceptor {

    private StringRedisTemplate redisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate redisTemplate) {
        this.redisTemplate = redisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String headerToken = request.getHeader("authorization");
       // log.info("token = {}",headerToken);
        if (StrUtil.isBlank(headerToken)){
            log.info("用户第一次访问 没有token！");
            return true;
        }
        // 2.基于TOKEN获取redis中的用户
        String key  = RedisConstants.LOGIN_USER_KEY + headerToken;
        Map<Object, Object> map = redisTemplate.opsForHash().entries(key);
       // System.out.println("map = " + map);
        if (map == null){
          //  log.info("token有效期到期！");
            return true;
        }
        // 5.将查询到的hash数据转为UserDTO
        UserDTO userDTO = BeanUtil.fillBeanWithMap(map, new UserDTO(), false);
        // 6.存在，保存用户信息到 ThreadLocal
        UserHolder.saveUser(userDTO);
      //  System.out.println("user = " + userDTO.toString());
        // 7.刷新token有效期
        redisTemplate.expire(key, LOGIN_USER_TTL, TimeUnit.SECONDS);
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        // 移除用户
        UserHolder.removeUser();
    }
}
